This is really a great MOC! I am mostly into spacecraft, but I have a lot of admiration for people who can build mech's like these! You clearly wanted to make this thing as smooth as possible, since I can't find a stud anywhere except from the one on the 3x3 disc bricks on its shoulders. Besides that I like the color scheme; I think dark and light gray, in combination with the dark sand yellow work wonderfully together.